Anzeige
Erschienen in:
01.01.2014
Piezoelectric and ferroelectric properties of Ga modified BiFeO3–BaTiO3 lead-free ceramics with high Curie temperature
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 1/2014
EinloggenAktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Abstract
High-temperature 0.71 Bi(Fe1−x
Ga
x
)O3–0.29 BaTiO3 (x = 0, 0.01, 0.015, 0.02, and 0.025) piezoelectric ceramics have been synthesized and their structure and electric properties have been investigated systemically. The Ga addition caused insignificant change of crystal structure. However, the addition of a small amount of Ga was quite effective to increase the grain size, densification, and piezoelectric properties. For the ceramics with x = 0.015, the maximum of piezoelectric constant (d
33), and electromechanical coupling factor (k
p) are d
33 = 157 pC/N, k
p = 0.326, respectively. Meanwhile, the increasing Curie temperature (T
c), 467 °C, was obtained with x = 0.02 ceramics. Both remanent polarization P
r and coercive field E
c were reduced with increasing x.